Heating appliance for printing presses



Jan. 10, 1933. H. A. BRANDTJEN HEATING APPLIANCE FOR PRINTING PRESSES Filed Dec. 11, 1950 2 Sheets-Sheet Jan. 10,' 1933.

H. A. BRANDTJEN HEATING APPLIANCE FOR PRINTING PRESSES Filed Dec. 11, 1930 2 Sheets-Sheet gwucmtw [1 61727 A Brandi G22 Patented Jan. 10, 1933 umreo srarss PATENT oFFm-E HEN-RY A. BRANDTJEN, on ST. PAUL, MINNESOTA, ASSIGN'OR ro BRANDTJEN' AND KLUGE, me, on s'r. PAUIHIYIINNESOTA, A oonronn'rroiv on MINNESOTA or J HEATING A'rrLIAiv'cri" non PRriv'rIfiG rnnssns Application filed December 11; 1331'); Serial No. 501,530;

My invention relates to improvements in heating appliances for printing presses, an

object thereof being to provide a heater so constructed and arranged that the heat therefrom willneut'ralize the static influences in Sheets of paper as they are fed to a printing press and deliveredtherefrom and so that the drying of the freshly printed sheets is hastened as theyare passed from the press and lie uppermost in the delivery pile.

Popularly employed in connection with the conventional job press of the platen type is a pneumatic sheet feeding and delivering device, the essentials of which are disclosed in Letters Patent ofthe United States No. 1,472,656, issued October 30, 1923 to A, Kluge et al. This automatic sheet feeding and delivering device includes an elevated feed table at the front of the press, an oscillating feed arm which feeds sheets one at a time from said elevated table to the platen of the press, a delivery table beneath the feed table, and a reciprocating delivery arm which carries the printed sheets from the platen of the press to the delivery table. Supported by and disposed beneath the delivery table is a blast pipe Which directs air between the sheets of paper on the feed table for aiding in the separation of the sheets thereon. In the operation of an automatically fed job press the conditions at times are such that static influences existing and/or induced in the stock objectionably affect the separation of the sheets at the food table and oh iectionably increase the offsetting effect inthe pile of printed sheets on the delivery table.

It is an object of my invention to provide an electric heater for attachment to the under side of the feed table of a printing press Which, by reason of the conduction, convec tion and radiation of heat therefrom is adapted to dissipate the static charges in the sheets at the feed table and in the printed sheets as they are taken from the pressplat-cn and piled on the delivery table.

Another object of the invention is to provide a heater, as above, whereby the drying of the fresh ink on a printed sheet is hastened as it is passed to the delivery table an lies uppermost in the pile thereon.

- A further object of the inventions to provide a heater of the foregoing description, which is adapted to heat the air in the air blast pipe.

, An additional object of the invention is to supply a heater of'the present character in the form of an attachment which is adapted to be quickly and easily applied to and removed from the feed table, and which, in

I its application to the feed table, is adapted to cooperate with the air blast pipe. A still further object of the invention is to provide an efiecti've heater attachment which is simple, durable, inexpensive in construction and light in Weight and which is adapt ed to be quickly and easily applied to and pemoved from a supporting structure therelVith the foregoing and other objects in view, which will appear in the following description, the invention resides in the novel combination and arrangement of parts and in the details of construction hereinafter de= scribed and claimed.

In the drawings, Fig. l is a lateral sectional view of a heater constructedand arranged in accordance with my invention, the feed table, feed and delivery arms, delivery table and press platen in connection with which the heater is shown being illustrated more or less diagrammatically; Fig. 2 is a detail view in section of the heater proper and of a part of the feed table and air blast pipe, said view showing the cooperation between the heater and said table and pipe in the application of the heater to the table, the section through the heater being taken as on the line 2-''2 of Fig. 3-; Fig. 3 is a bottom View of the heater proper, and Fig. 4 is a fragmentary perspective viewthereof and of the feeding table.

Referring to the drawings, wherein similar reference characters are employed to designate similar parts throughout the sev eral views, I have illustrated fragmentarily and more or less diagrammatically in Fig. 1 various parts of a printing unit including the platen of a printing press and mechanism for automatically feeding sheets thereto and delivering the same therefrom, the platen being designated'by the numeral 10; The feeding and delivery mechanism includes a stock magazine A, a pneumatic feed arm B for taking sheets from the magazine A and placing them upon the platen 10, a delivery table and a delivery arm D for taking printed sheets from the platen and delivering them to said delivery table C.

The stock magazine A includes a feed table 11 of heat conducting material upon which the sheets to be fed stand on ed e, and also includes a movable back rest 12 or advancing the pack of sheets along said table. Further included in the magazine structure is a blast pi 13 of heat conducting material extending a ong the under side of the feed tablell near the forward edge thereof, said pipe being supported by hanger lugs 14 depending from said table 11. This blast pipe 13 is connected through a tube 15 with a source of air supply, and is provided with an upwardly extending branch pipe 16 which directs air between the foremost sheets of a pack supported on the table 11.

The heater proper is an elongated structure consisting of a pair of cast heads 17 of heat conducting material and a hood-like body portion 18 of sheet metal secured at its ends to inturned flanges 19 formed on said heads 17, said body portion constituting a reflector, the inner face thereof being of such character as to provide an effective reflecting surface. Each of the heads 17 is formed with an inwardly projecting lug 20 and to these lugs is secured a resistance element 21 of conventional design, said element being fastened at its end to said lugs by means of bolts 22. An electrical connection is provided for said resistance element 21, the same including a male plug 23 and a female plug 24, the former being connected through leaders 25 and 26 with the terminals 27 and 28 of the resistance element 21 and the latter being connected through wires 29 with a power line. The male plug 23 is secured within a socket-like holder 30 fitted in a bore in one of the heads 17 and secured to said head by means of anchoring screws 31. In completing the connection between the female plug and the male plug, the former is inserted into the socket-like holder 30 and, in the process, receives the terminals of the male plug. Each of the heads 17 includes a forwardly extending arm 32 which is adapted to rest upon and fulcrum over the blast pipe 13 on the sheet feeding magazine, a recess 33 being formed in the bottom of each arm to receive the upper portion of said pipe. Each head 17 is formed with a pair of abutments, one abutment consisting of a lug 34 cast integrally with the head proper and the other abutment consistin of a screw 35 threaded in a boss 46 at the orward extremity of the arm 32. As will be noted in the drawing and particularly in Fig. 2, these abutments on each head 17 are disposed upon opposite sides of the axis of the blast pipe 13. And as will be observed, the screws 35 serve to engage the table 11 and swing the heater on the blast pipe 13 in a manner bringing the abutment lugs 34 into contact with the table 11, whereby the heater is rigidly held in operative position in engagement with said table 11 and pipe 13. The cross sectional formation of the reflector body 18 is so designed in respect to the resistance element 21 and the delivery table C that the heat from said element is reflected against the upper surface of said table throughout the extent thereof.

My invention embodies the employment of a second air blast pipe 37, which is mounted to turn in the hanger lugs 14, a handle 38 (Fig. 4) being provided for turning said pipe 37 and a set screw 39, threaded in one of said hanger lugs, being supplied to secure the blast pipe 37 in the various positions of its angular adjustment. Feeding said blast pipe 37 is a suitable hose connection 40 leading from any suitable source of air supply. This pipe 37 is disposed beneath the reflector body 18 of the heater proper, and is heated by heat radiated therefrom, the air in said pipe 37, in turn, being heated. Issuing from the pipe 37, centrally thereof, is a branch pipe 41, which is directed, ordinarily, to project the blast of warm air from pipe 37 against the center of the uppermost sheet on the delivery table C.

When not in use, the heater proper may be bodily removed from the feeding magazine A by simply loosening the abutment screws 35 and unhooking the arms 32 of the heads 17 from the blast pipe 13. In reapplying the heater to the feed magazine A, the arms 32 of said heads 17 are simply hooked over the blast pipe 13 and the screws 35 turned against the table 11 to swing the heater on the pipe and bringthe abutment lugs 34 into firm engagement with the table 11.

In the use of my invention, the feed table 11 and the pack of stock in the feeding magazine are heated by the heater, principally through convection and conduction. Thus. the individual sheets of paper are made better conductors in themselves and the air about the paper is made a better conductor by reason of the convective movement thereof induced by the heat. Under these conditions, any existing static in the stock is, in a measure, neutralized. Th s neutralizing or dissipating of the static influence is carried on in more marked degree at the head of the pack, where the air from the blast pine .13, also warmed by the heater, is projected upwardly between the foremost sheets of the stock. This blast of warm air between the first and second sheets efl'ectuallv minimzes the remaining static charge therein permitting of the ready separation of the first sheet from the pack and it effectually prevents the generation of additional static in the foremost sheets of the pack as the first thereof is removed by the feed arm B. The heater not only serves the purposes above indicated, but, by radiation, hastens the drying of the ink on a printed sheet as it is passed from the platen by the delivery arm D into. uppermost position on the pile of sheets on the delivery table C. And, in addition to drying the ink on a freshly printed sheet, the radiated heat effectually dissipates the static generated in such sheet as it is bent and stretched against the type in the form and the tynipan on the platen during the impression, and as the particles of ink are torn apart in the stripping of the printed sheet from the form, and as the sheet is stripped from the tympan by the delivery arm D. In thus securing the hastened drying of the ink on the printed sheets and thus divesting such sheets of their static charges, the offsetting usually exper enced in the pile of printed sheets is largely eliminated. To assist in drying the ink on the freshly printed sheet and in diss pating the static charge therefrom as the sheet is passed to and settles in uppermost position on the printed pile, the air blast pipe 37 is employed, when desired, the warm air from the branch pipe 41 being usually directed against the sheet centrally thereof. In this connection it will be understood that the current of warm air not only supplies a good conductor for neutralizing the static in the stock, but also, by reason of its force, flattens out any corners or margins of the sheet that may have a tendij ency to curl and cause the folding of the sheets in the delivery pile. This sheet flattening action of'the air blast from branch pipe 41 ohtains, of course, whether or not the heater is in operation. And in any event, the angry lar adjustment of the pipe 37, through the medium of handle 38, provides for dlrecting more or less of the blast toward the front or rear of the freshly printed sheets, as may be required to keep the sheet fiat.

From the foregoing, it will be understood that my invention is particularly advantageous in that the difficulties met in the handling of paper stock and caused through static influences and otherwise are effectually removed with the resulting enhancement I particularly adapted to be readilyapplied to and removed from the equipment in connection with which it is used.

Changes in the specific form of my invention, as herein disclosed, may be made Within the scope of what is claimed without departing from the spirit of my invention.

Having described my invention, what I I claim as new and desire to protect by Letters Patent is:

1. A heating appliance for application to a platen press having a'feed table of heat con-v ducting material, a delivery table beneath the feed table, an air blast pipe of heat conducting material beneath the feed table for blow ing air into the stock thereon, and means for opposite sides of the pipe, one abutment being adjustable to removably secure the head with respect to said feed table and pipe, said appliance further including a downwardly directed reflector mounted at its ends onsaid heads, said appliance serving to heat the feed table and pipe by convection and also by conduction through said heads and serving further to heat the delivery table by radiation through said reflector. 4 2. A heating appliance for application to a platen printing press having an upper stock feeding support of heat conducting material, a lowerstock receiving support and an air blast pipe of heat conducting material beneath the upper support for blowing air into the stock thereon, said heating appliance comprising a pair of'heads of heat conducting material, a resistanceelement mounted at its ends on said heads, each head having an abutment thereon and an arm fulcrumed on said pipe and also having an abutment, said abutn ents being adapted to engage the upper support at the under surface thereof at opposite sides of the pipe, one abutment being adjustable to removably secure the head with respect to said support and pipe, said appliance serving to heat the upper support and pipe by convection and also by conduction and serving further to heat the lower support by radi-. ation. i I

3. In combination, a platen printing press having a feedtable and a delivery table, the former above the latter, and a heater disposed between said tables and including a reflector directed toward the delivery table, said heater serving to heat the feed table and, in turn, the stock thereon to be printed and also serving to heat the stock on the delivery table.

4. In combination, a platen printing press having a feed table, a delivery table therebeneath, a blast pipe beneath said feed table for'supplying air to the stock thereon, and a heater disposed between said tables to heat, the printed stock on the delivery table and to heat the feed table and said pipe and the air therein for heating, in turn, the stock on the feed table.

5. An electrical heatingappliance for application to a stock magazine including a table of heat conducting material and a blast pi of heat conducting material beneath said table for supplying air to the stock there on, said appliance comprising a pair of heads of heat conducting material, a reflector bod of sheet metal and a resistance element, sai body and element being mounted at their ends on the heads, each head including an arm fulcrumed on said blast pipe and having a screw thereon for engagement with said table at one side of the axis of the blast pipe and further including an abutment member for enga ement with said table at the other side of t e axis of said blast pipe. I

6. An electrical heating apparatus for application' to a stock magazine including a table of heat conducting material and a fulcrum member adjacent thereto, said appliancecomprising a pair of heads of heat conducting material and an electric resistance element mounted at its ends on the heads, said heads being fulcrumed on said fulcrum member, and having clamping means at the Opposite sides of the axis thereof for en gagement with said support, the means at one side of the fulcrum member being adjustable for releasably securing the heater with respect to said support and fulcrum member.

7. A heating appliance for stock accumulating in a pile, said appliance including an air blast pipe having an outlet directed toward the pile and further including an electrical resistance element and a reflector directing heat from said element toward said pile and toward the stream of air issuing from said pipe. 7

8. A heating appliance for a stock magazine having a heat conducting table, said appliance including an air blast pipe having an outlet directed toward the stock on said table and further including a heater disposed adjacent to said table and to said pipe for heatingboth thereof, whereby the stock,

HENRY A. BRA DTJEN.

in turn, is heated by the table and by the heated air issuing from said pipe.

9. An electrical heating appliance for application to a stock magazine including a heat conducting table and a heat conducting blast pi e for supplying air to the stock on said tab e, said appliance consisting of a resistance element, and a heat conducting mounting therefor having a fulcruming portion for engagement with said pipe and an abutment portion in opposition to said fulcruming portion for engagement with said table.

10. A heating appliance for application to a platen printing press having a feed table of heat conducting material and a delivery table beneath said feed table, said appliance including a resistance element, a mounting of heat conducting material supporting said element, means for detachably securing said mounting to said feed table at the lower side thereof and in contact therewith, and a reflector for said element supported by said 

